To see your license information, you must first click the "Admin" tab of the network, and then click "License" on the left hand side.  If you do not see the "Admin" tab, then you are not a PBworks Admin and do not have access to this setting.
 

When you purchase your Business Edition network, the license is connected to your network by our sales team.  All features of the Business Edition are enabled when you sign up for the service without a paid license, however the license limitations for all unpaid instances of PBworks networks are greatly reduced.  Contact our sales team at 1-415-963-4369 to get your network within the limitations for your license.

Sample License limits for a free Business Edition network.  Please note, limitations on free Business Edition instances are subject to change without notice: